[Ndn-interest] [EXT] Interest Forwarding in NDN

Junxiao Shi shijunxiao at email.arizona.edu
Tue Sep 15 12:52:21 PDT 2020

Hi Arif

Yes, it is possible to broadcast Interests without expecting reply Data.

As mentioned in NDN Protocol Design Principles
https://named-data.net/project/ndn-design-principles/ :

Hop-by-Hop Flow Balance: Over each link, one interest packet should bring
back no more than one data packet.

This means, sending one Interest and receiving zero Data does not violate
the NDN protocol.

However, using one-way Interests is not recommended. It has several

   - You don't get NDN's caching benefit because Interests cannot be cached.
   - You don't get NDN's security benefit because Interests are generally
   not signed. Although signed Interests exist, they are for specialized cases
   such as prefix registration commands.
   - There's no feedback on whether your one-way Interests are received by
   the recipients.

If you found you need one-way Interests, you are better off using UDP

Yours, Junxiao

On Tue, Sep 15, 2020 at 11:24 AM Arif Hussain Magsi <ahmagsi at sau.edu.pk>

> *External Email*
> Dear all,
> Can you please guide me regarding following issue?
> In NDN, if a node wants to share some information by broadcasting an
> interest packet among the neighboring nodes. The neighboring nodes can only
> store the information in their PIT without sending back any data packet. is
> it possible in NDN.
> Rather than using Pub/sub approach, I want to utilize interest message
> itself.
> With Best Regards,
> Arif Hussain Magsi
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